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What are the signs of the mysterious radiation?

Signs warning of radiation and fire hazard.

Colorful Russian superstition

Primary fire extinguishing means: general requirements

Dangerous objects (potential) may be close

How to recognize a person incapacitated?

Fire safety in the production of: basic requirements

Hazards of fire: what to pay attention in the first place?

Basic safety rules for children

Personal hygiene: the principles and their observance

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Business Ethics
Business custom
Diplomatic protocol and etiquette